Boiler



D. F. KILGOUR.

BOILER.

APPLICATION FILED MAY19. 1915.

1,321,755, 7 Patent ed Nov. 11, 1919.

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n. F. KILGOUR.

BOILER.

/ APPLICATION FILED MAY19,1916.

1 321 1 '7 5 5 Patented Nov. 11, 1919.

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0. F. KILGOUR. BOILER.

APPLICATION FILED MAY l9. I916.

1,321,755. Patented Nov. 11, 1919.

5 SHEETS-SHEEI 3- D. F. KILGOUR.

BOILER.

APPLICATION FILED MAY 19. I916.

1 ,32 1 75 5 Patented Nov. 11, 1919.

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UNITED STATES PATENT OFFICE.

DWIGHT F. KILGOUR, OF LEXINGTON, MASSACHUSETTS.

BOILER,

Application filed May 19, 1916.

To all whom it may concern:

Be it known that I, DWIGHT F. KrLeoUR, a citizen of the United States, and a resident of Lexington, in the county of Middlesex and Connnonwealth of Massachusetts, have invented an Improvement in Boilers, of which the following description, in connection with the accompanying drawings, is a specification, like characters 011 the drawings representing like parts.

This invention relates to boilers and among other objects provides a boiler having a vertical barrel and a setting embodying certain features of the setting shown in Letters Patent of the United States No. 909,805 granted to me January 12, 1909.

The setting disclosed in said patent is essentially long horizontally to allow sufficient space for the parts thereof which are necessary to produce its efficient burning of the fuel, high heating effect, and substantial elimination of smoke.

The setting in said patent is shown applied to a horizontal barrel, but for some uses the vertical barrel is preferable. The setting, however, is much longer than the diameter of the commercial vertical barrel, but by the present invention the said setting is adapted to the vertical barrel with the advantages thereof and certain other important advantages hereinafter referred to.

The character of the invention may be best understood by reference to the following description of an embodiment thereof shown in the accompanying drawings, wherein Figure 1 is a side elevation of the illustrative boiler shown herein as embodying the invention;

Fig. 2 is a vertical, transverse section taken on line 2-2 of Fig. 5;

Fig. 3 is a front elevation of the setting and a portion of the barrel;

Fig. l is a rear elevation of the setting and the barrel;

Fig. 5 is a vertical, longitudinal section taken on line 55 of Fig. 3;

Fig. 6 is a horizontal section taken on line 66 of Fig. 5; and

Specification of Letters Patent.

Patented Nov. 11, 1919.

Serial No. 98,655.

upper chamber having a passage 5 for communicating with the usual stack (not shown).

To support the barrel it is provided with feet 7 (Figs. 1, a, 5 and 7) adjacent its lower end resting upon horizontal beams 9 mounted 011 columns 11 (Figs. 4 and 6) convenproducts of combustion from the fire-box to the lower ends of the fines of the barrel as more fully hereinafter described? Access to said chamber may be had through a rear door 14. Spaced side walls 15 project for wardly from the curved wall and contain two of the columns 11 referred to. The side walls are strengthened by vertical ribs 17 having their lower ends anchored in the foundation for the setting and their upper ends connected by tie-rods 19.

The crown of the fire box comprises an arch 21 (Fig. 2) of brick or other suitable material having its ends supported by the side walls and strengthened by bars 23. The front wall 25 of the setting may be of brick or other suitable material covered by a plate 27 provided with fire doors 29 and ash pit doors 31. 1

Grate bars 33 are mounted on transverse bars 35 supported by the side walls of the setting.

At the rear end of the grate bars is a bridge wall 37 having a vertical air duct 39 therein communicating at its upper end with twyers 4:3 and adapted to receive air through a perforated door 45 in one of the side walls.

At the rear of the bridge wall and spaced therefrom is a wall 4:7 extending from the crown to the bottom of the setting and provided at or near its bottom with an opening communicating with a rearwardly extended combustion chamber 49. p This chamber com prises side walls set in from the main walls of the setting and is of a general horse-shoe shape, flaring rearward and inclined slightly downward. The rear end of this combustion chamber communicates with the vertical chamber referred to leading to the flues of the boiler. Preferably the Combustion chamber extends a substantial distance into said vertical chamber as best indicated in Figs. 5 and .6.

Fuel fired on the grate gives off its prod-' ucts of combustion .which flow rearward over the bridge wall as indicated by the arrows in Fig. 5 and encountering the wall 47 are deflected downward behind the bridge wall to or near the bottom of the setting thus concentrating the products of combustion from the top to bottom of the setting or vertically. As the products of combustion pass the bridge wall they are mixed with the air and steam issuing from the twyers 43 and pass into a mixing chamber 51 (Fig. 5) located behind the bridge wall at the entrance to said combustion chamber. The products of combustion pass from this chamber rearward'through the combustion chamber 49, which collects and draws in the products of combustion coming from the sides of the grate and concentrates the same laterally. The products of combustion thus become thoroughly mixed in said chamber and the final combustion takes place therein I as fully explained in said patent. The products of combustion pass from the combustion chamber into the chamber behind the same and are distributed thereby to the flues of the boiler. They pass thence out ward through the passage 5 to the stack.

The eifect of the combustion in the combustion chamber is to heat the walls thereof to an intense and practically white heat of incandescence effecting in actual practice practically completecombustion. Thus the forwardly from said barrel. 'rle cribed means for utlhzm this p rtlon products of combustion in passing from the grate rearwardly to the distributing chamber arrive at a high state of combustion with an intense heat before they reach the stantially longer horizontally than the diameter of the barrel. Therefore the-latter covers merely a part of the setting, leaving a substantial length of the latter projecting Next will be box from the high heats therein.

of the setting to increase the water and steam-generating capacity of the boiler and to protect the walls and crown of the fire- To accomplish this, a water delivery pipe 53 (Fig. l) is connected to and cmmnunicates with the barrel adjacent the lower end thereof and extends downwardly therefrom to and communicates with a cross pipe 55, communicating in turn with vertical headers 57 at the rear end of the setting. These headers are connected with tubes 59 which extend forwardly through the walls of the setting beneath the barrel and have portions 61 exposed in the distributing chamber. These tubes extend thence forwardly through the vertical wall 47 along the inner faces of the side walls of the fire-box to and through the front wall thereof, where they are connected with vertical headers 63. The described circulatory system not only presents additional heating surface and protects the setting, but also prevents the formation of a scale on the bottom tube sheet by maintaining a rapid circulation of the water and by providing in the lower ends of the header 57 a settlement chamber or mud drum which is removed from the di rect heat of combustion and which is connected to the boiler by a connection which is also removed from the direct heat of combustion. This arrangement prevents the formation of scale or mud deposit on the lower tube sheet, which usually causes rapid deterioration of this tube sheet by burning of the metal.

The headers 57 and 63 may be provided with plugs 165 opposite the ends of said tubes and adapted to be removed to permit access to said tubes for convenience in assembly and repair thereof. The lower ends of the headers may be provided with pipes 167 having valves 169 and adapted to permit water to be drained from said headers as desired.

The headers (33 at the front of the setting are connected at their upper ends with a cross header 65 connected in turn with a series of tubes 67 which extend rearward beneath and adjacent the crown of the firebox toward the vertical wall 457. They curve thence upwardly through the crown of the setting and are connected with a horizontal header 69 (Fig. 3), comn'lunicating in turn with a pipe 71, leading upward to a point substantially midway of the length of the boiler and connected by an elbow pipe 73 (Fig. l) with said boiler. The horizontal headers 65 and 69 may be provided with plugs 75 and 77 respectively, opposite the ends of the tubes 67, permitting access thereto for assembly, replacement or repair thereof. By passing at least one end of the tubes in the circulatory system through one end of the setting and by supporting at least one of the manifolds slidably, as on the projections from the front plate 27, the longitudinal expansion of the tubes is permitted, without buckling of the tubes.

The spaces between the horizontal runs of the tubes 67 beneath the crown of the setting may be closed by tiles 79 (Fig. 2) of fire clay or other suitable material resting thereon. These tiles will cooperate with said tubes to protect the crown 21 of the setting from the fire in the fire-box in a highly desirable manner.

Water may be supplied to the boiler through a pipe 81 provided with a valve 83 and located a substantial distance up from the base of the boiler.

In use, water surrounding the fines in the boiler may flow downward through the pipe 53 and branch pipes 55 to the headers 57 and pass thence upwardly through the tubes 59 to the forward headers 63. During the initial portion of the circulation and before the water has passed into tubes surrounded by the products of combustion, the mud or sediment in the water will settle in the bottom portions of the header 57 which constitutes one form of mud receiver or mud drum. In the course of its transit the water will be heated and transfonned into steam from the high heats in the walls of the distributing chamber and from the products of combustion passing from the grate along the side walls of the setting to the combustion chamber. The water and steam will pass from the headers 63 upward into the horizontal header 65 and pass thence rearward again through the setting, beneath the crown of the fire-box, where it is further subjected to high heats, and passes thence upward through the pipe 71 and elbow pipe '73 to the boiler delivering its steam above or adjacent the level of the water in the boiler. Thus by the arrangement of tubes described a circulation is maintained from the boiler down through the setting, again through the setting, and thence upward to the barrel. The tubes not only desirably protect the sides and crown portion of the setting which are not covered by the barrel, but also substantially increase the water capacity of the boiler and the percentage of the area of steam-generating surface to the grate area.

Having described one illustrative embodiment of the invention without limiting the same thereto, what I claim as new and desire to secure by Letters Patent is:

1. In combination with a boiler having a circulatory system; an ofiset fire-box havlng a top including a plurality of tubes forming a part of said circulatory system, the bottoms of said tubes being exposed to the fire, tiles carried by and above said tubes; and an air space between the top of said tiles and. the top of said. fire-box.

2. The combination of a vertical fire tube boiler and its fines of a setting, an offset fire box, a combustion chamber, and a circulatory system, including a header having a supply connection at the rear of said setting, a plurality of water tubes extending from said header to the front of said fire box and a mud receiving receptacle connected to said header and exterior to said combustion chamber.

3. The combination with a vertical fire tube boiler and its fines of a setting, in cluding an oflsetfire box and a circulatory system, including a supply connection from the barrel of said boiler to a header; a plurality of horizontally disposed lateral tubes connected to said header and extending longitudinally of said fire box at one side thereof;' a second header connecting the other end of said tubes; and a plurality of horizontally disposed return tubes connected tosaid second header and passing through the upper portion of said fire box and connected to a return connection in the barrel of said boiler, said system conducting water from said supply connection through said lateral tubes to said return tubes and thence through said return connection to said boiler.

4:. In combination with a boiler having a circulatory system; an offset fire-box having a top including a plurality of tubes forming a part of said circulatory system; tiles carried by said tubes; and an air space between the top of said tiles and the top of said fire-box.

5. In combination with a fire tube boiler having a setting and an offset fire box; a circulatory system including a plurality of water tubes extending in a generally horizontal direction through both ends of said setting and said fire box and slidable relative to said setting and said fire box for expansion independent thereof.

6. In combination with a boiler having a circulatory system; an off-set fire-box having a top including a plurality of tubes forming a part of said circulatory system, the bottoms of said tubes being exposed to the fire, tiles carried by and above said tubes; and an air space between the top of said tiles and the arch of said fire-box.

7. In combination with a boiler having a circulatory system; an off-set fire-box having a top including a plurality of tubes forming a part of said circulatory system; tiles carried by said tubes; and an air space between the top of said tiles and the arch of said fire-box.

8. In combination with a vertical tubular boiler having a barrel and a setting, includ ing a fire-box at one side of said barrel; a circulatory system having a supply connection at the side of said barrel adjacent the bottom. thereof; a manifold exterior to said setting and connected to said supply connection; side tubes extending from said manifold through said setting laterally of said fire-box; a second manifold at the other end of said side tubes; top tubes connected to said second manifold and forming a portion of the top of said fire-box; and a return connection for carrying water from said top tubes back to said barrel.

9. A boiler comprising in combination, a vertical barrel and its flues, a setting therefor provided with a fire-box having a bridge wall, a wall at the rear of the latter leaving a mixing chamber between them, a combustion chamber of substantial length having an entrance end substantially narrower than said mixing chamber, a chamber beneath said barrel to distribute the products of combustion from said combustion chamber to said fines, steam-generating tubes in said fire-box, and means connecting said tubes with said barrel.

10. A boiler comprising in combination, a vertical barrel 1 and its fines 3, a setting therefor provided with an offset fire-box having a bridge wall 37, a wall 47 at the rear of said bridge wall leaving a mixing chamber between them, a combustion chamber 49 for receiving the products of combustion from said mixing chamber, a distributing chamber for delivering the products of combustion from said combustion chamber to said flues and a steam generating Water circulating system connected to said barrel and protecting the walls and top of said ofiset fire-box.

In testimony whereof I have signed my name to this specification.

DWIGHT F. KILGOUR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

